Intel's New Role in Apple's Chip Strategy: Testing Legacy Processors on Advanced 18A-P Node

Recent reports indicate that Intel has begun testing production of Apple's low-end and legacy processors for iPhone, iPad, and Mac devices. This shift comes as Apple anticipates that TSMC's manufacturing resources will increasingly prioritize artificial intelligence (AI) applications, potentially affecting the supply of chips for older or entry-level Apple products. Below, we explore the implications and details of this development through a series of questions and answers.

What chips is Intel testing for Apple?

Intel has initiated testing production of so-called "low-end/legacy" processors for Apple's iPhone, iPad, and Mac product lines. These are not the latest flagship chips but rather older or entry-level silicon, often used in budget-friendly devices or as cost-effective components in previous-generation models. The testing is being conducted on Intel's new 18A-P series, which employs Foveros packaging technology—a 3D stacking method that enhances performance and power efficiency. This marks a significant departure from Apple's long-standing reliance on TSMC for almost all its chip production.

Why is Apple turning to Intel for legacy processors?

Apple's decision to explore Intel for legacy chip production stems from its belief that TSMC's manufacturing resources will increasingly tilt toward AI applications. As AI chips—such as those for data centers and advanced machine learning—become more lucrative and strategically important, TSMC may allocate more of its advanced capacity to AI customers like NVIDIA and AMD. This could create supply constraints for Apple's low-end and legacy processors, which are less profitable. By testing Intel's 18A-P node, Apple aims to diversify its supply chain and secure a reliable source for these less cutting-edge chips, ensuring continued availability for older devices and budget models.

What is Intel's 18A-P series and Foveros packaging?

Intel's 18A-P series represents a leading-edge manufacturing node in the company's roadmap, named for its 1.8nm-class process technology. The "P" likely stands for a performance-enhanced variant, optimized for power and efficiency. This node incorporates Foveros packaging, a 3D die-stacking technology that allows multiple chips to be bonded vertically, improving interconnect density and reducing latency. For legacy processors, this packaging could enable Intel to integrate older logic dies with newer memory or power management components, potentially matching TSMC's capabilities. The use of Foveros also hints that Intel is positioning itself as a foundry capable of complex heterogenous integration for Apple's needs.

How does this affect Apple's relationship with TSMC?

While Apple's move to test Intel's production for legacy chips may seem like a shift, it does not signal an immediate break with TSMC. Apple remains TSMC's largest customer for cutting-edge processors, including the A-series and M-series chips for iPhones, iPads, and Macs. However, Apple's perception that TSMC's resources will tilt toward AI could lead to a gradual rebalancing. By offloading low-end and legacy production to Intel, Apple frees up capacity at TSMC for its most advanced chips, while also gaining a secondary supplier. This diversification reduces risk but may also strain TSMC's relationship if Apple reduces its share of legacy orders. Ultimately, Apple benefits from having multiple foundry partners, especially as AI demand surges.

What does this mean for Intel's foundry business?

This development is a major boost for Intel's foundry services, which have been seeking high-profile customers beyond its own products. Landing Apple—even for legacy chips—is a validation of Intel's process technology and packaging expertise, particularly its 18A-P node with Foveros. It signals that Intel can compete with TSMC for certain orders, especially those requiring advanced packaging. For Intel, this could lead to more business from other chip designers looking for alternatives to TSMC. However, the financial impact may be limited initially, as legacy processors are lower volume and margin. Still, it positions Intel as a credible player in the contract manufacturing space.

Will this impact the pricing of Apple's legacy devices?

The testing phase suggests that Intel may become a source for chips used in older iPhones, iPads, and Macs, which could stabilize or lower production costs. By diversifying suppliers, Apple gains negotiating leverage, potentially reducing per-unit cost for legacy silicon. If Intel's pricing is competitive, Apple might pass some savings to consumers in the form of lower retail prices or more attractive entry-level models. However, legacy devices often have smaller profit margins, so Apple may instead use the cost savings to maintain margins rather than reduce prices. Additionally, any transition period could cause temporary supply fluctuations, but long-term, consumers might see more reliable availability of older models.

Is this a long-term shift or a temporary experiment?

Given that Apple has begun testing production, this likely starts as a pilot program to evaluate Intel's quality, yield, and cost. If successful, Apple could gradually ramp up volumes for legacy chips. The long-term viability depends on multiple factors: Intel's ability to match TSMC's reliability, the scale of AI-driven capacity shifts at TSMC, and Apple's own product roadmaps. Apple may choose to keep Intel as a secondary source for legacy chips, while reserving TSMC for leading-edge nodes. The trend toward AI-intensive chips suggests that TSMC's focus will only intensify, making Intel a logical backup. Thus, it could evolve into a multi-year relationship, though not a complete replacement for TSMC.